Nerf Bar Fit

Hey all - I'm new to the site and have recently purchased a 99 Chevy 1500 Suburban. I want to put some nerf bars (or similar) on it so its easier to get in. Will nerf bars for a 2000-2009 fit the 1999?

I'm really not familiar with how they mount or how much modification would be need to get them to fit. I ask cause I can get my hands on a new set of SS ones for $100 but that are marked for the newer burb.